docs: def get_version_info():
      """Get version info from the sys module.
  
      Override from environment for testing.
      """
      overrides = os.environ.get('__TOX_TRAVIS_SYS_VERSION')
      if overrides:
          version, major, minor = overrides.split(',')[:3]
          major, minor = int(major), int(minor)
      else:
          version, (major, minor) = sys.version, sys.version_info[:2]
      return version, major, minor